While primarily a data logger, certain versions of these custom Mode 22 scripts allow for basic "active tests," such as cycling a cooling fan or testing an EVAP solenoid.
It unlocks access to PIDs like "Oil Pressure" (which many GM trucks don't report over standard OBDII), "Transmission Fluid Temp," and "Desired vs. Actual Idle." gm mode 22 scan tool by terry
would be a context-aware dashboard that groups specific outputs and inputs relevant to the current diagnostic mode, enabling "One-Touch" testing for common GM problem areas. While primarily a data logger, certain versions of
“If you own a 1998–2013 GM truck and want to see exactly what your ECM, TCM, and ABS module are doing – without spending $1,000 on a Tech 2 – Terry’s Mode 22 tool is a must-have. It’s not pretty, but it works.” “If you own a 1998–2013 GM truck and
Though largely superseded by modern apps and GDS2 software , "GM Mode 22 Scan Tool by Terry" remains a nostalgic name for anyone who spent their weekends in a garage with a bulky laptop and a dream of fixing their own Chevy or Buick.